X120鋼級(jí)螺旋縫埋弧焊管研制結(jié)果及分析

R ＆ D Achievement of X120 SAWH Pipe and Relevant Analysis

摘要: X120鋼級(jí)管線管是目前國(guó)際上研發(fā)的最高鋼級(jí)的管線管。介紹了渤海裝備公司華油鋼管有限公司研制開(kāi)發(fā)X120鋼級(jí)螺旋縫埋弧焊管的結(jié)果。通過(guò)金相組織分析及各項(xiàng)試驗(yàn)表明,所研制鋼管的性能滿(mǎn)足APISpec5L標(biāo)準(zhǔn)(44版)的要求,安全性高,但屈服強(qiáng)度偏高,夏比沖擊功偏低。針對(duì)存在的不足,提出了降低鋼帶屈服強(qiáng)度,提高卷曲溫度,適當(dāng)降低鋼中B、Mo和Ni合金元素含量,以及降低鋼的碳當(dāng)量等建議。

Abstract: The X120 steel linepipe is regarded so far as the linepipe in the most premium steel grade in the world.Elaborated here in the article is the achievement from the R & D activities for the X120 SAWH pipe as performed by North China Petroleum Steel Pipe Co.,Ltd.Relevant metallographic structure analyses and tests demonstrate that the X120 SAWH pipe as developed is in conformity to the requirements as specified under API Spec 5L(the 44th edition),and features high safety level,nevertheless its yield strength is rather high,and its charpy impact value rather low.Addressing the existing shortcomings,corrective actions are proposed,including reducing the yield strength of the strip steel,increasing the coiling temperature,and properly cutting down the contents of the alloy elements B,Mo and Ni and the carbon equivalent in the steel,etc.